private void handleShortAndLongOption()

in src/main/java/org/apache/commons/cli/DefaultParser.java [488:549]
50 lines of code
13 McCabe index (conditional complexity)

    private void handleShortAndLongOption(final String hyphenToken) throws ParseException {
        final String token = Util.stripLeadingHyphens(hyphenToken);
        final int pos = indexOfEqual(token);
        if (token.length() == 1) {
            // -S
            if (options.hasShortOption(token)) {
                handleOption(options.getOption(token));
            } else {
                handleUnknownToken(hyphenToken);
            }
        } else if (pos == -1) {
            // no equal sign found (-xxx)
            if (options.hasShortOption(token)) {
                handleOption(options.getOption(token));
            } else if (!getMatchingLongOptions(token).isEmpty()) {
                // -L or -l
                handleLongOptionWithoutEqual(hyphenToken);
            } else {
                // look for a long prefix (-Xmx512m)
                final String opt = getLongPrefix(token);

                if (opt != null && options.getOption(opt).acceptsArg()) {
                    handleOption(options.getOption(opt));
                    currentOption.processValue(stripLeadingAndTrailingQuotesDefaultOff(token.substring(opt.length())));
                    currentOption = null;
                } else if (isJavaProperty(token)) {
                    // -SV1 (-Dflag)
                    handleOption(options.getOption(token.substring(0, 1)));
                    currentOption.processValue(stripLeadingAndTrailingQuotesDefaultOff(token.substring(1)));
                    currentOption = null;
                } else {
                    // -S1S2S3 or -S1S2V
                    handleConcatenatedOptions(hyphenToken);
                }
            }
        } else {
            // equal sign found (-xxx=yyy)
            final String opt = token.substring(0, pos);
            final String value = token.substring(pos + 1);

            if (opt.length() == 1) {
                // -S=V
                final Option option = options.getOption(opt);
                if (option != null && option.acceptsArg()) {
                    handleOption(option);
                    currentOption.processValue(value);
                    currentOption = null;
                } else {
                    handleUnknownToken(hyphenToken);
                }
            } else if (isJavaProperty(opt)) {
                // -SV1=V2 (-Dkey=value)
                handleOption(options.getOption(opt.substring(0, 1)));
                currentOption.processValue(opt.substring(1));
                currentOption.processValue(value);
                currentOption = null;
            } else {
                // -L=V or -l=V
                handleLongOptionWithEqual(hyphenToken);
            }
        }
    }